ИСТИНА

Our analysis of a sunward Poynting flux throughout magnetosheath and foreshock (directly measured by INTERBALL-1, CLUSTER-4 and DOUBLE STAR TC1), clearly demonstrates, for the first time, how the waves caused by the magnetopause and resonances in the magnetospheric boundary layers are transmitted back towards the bow shock: the short impulses of the sunward Poynting flux provoke the strongest 3-wave interactions with the incident dominant dynamic pressure. The interactions start in the foreshock, regulate the bow shock position and oscillations, and then another near- magnetopause 3-wave interactions assist plasma flow extra deflections and acceleration downstream magnetopause. At the border of stagnant cusp throat we confirm the nonlinear interactions to be the general tool for deflection of the external MSH flow near the step- like magnetopause. Inertial drift and nonlinear Cherenkov resonance are alternatives versus the deformed bow shock in the plasma jets' production in magnetosheath. MHD model reproduces the physics of the interaction, gasdynamic one -does not.